Microsoft says its Slack competitor, Teams, now has 13M+ daily active users and 19M+ weekly active users; in a filing in April, Slack said it has 10M DAUs
Tom Warren / The Verge :
Context & Ripple Effects
Microsoft's Teams user disclosure turns a quiet bundling strategy into a public scoreboard: with 13M daily active users against the 10M DAUs Slack reported in its April filing, the Office-attached chat app now out-reports the category's independent pioneer on its own headline metric.
The numbers race only accelerates from here — by November Microsoft claims 20M DAUs for Teams while Slack sits at 12M, and Slack's stock drops sharply on the news. The pandemic-era surge then takes Teams to 44M DAUs within months, making this July milestone the moment the lead changed hands.
First-order effects
- Microsoft now has a public number to pitch enterprise buyers with: Teams' 13M DAUs top Slack's 10M filing figure, flipping the narrative from challenger to leader in workspace chat.
- Slack loses its signature stat as a selling point — the DAU comparisons investors and buyers will cite are Microsoft's, and the related coverage shows the market punishing Slack's stock each time Microsoft updates the count.
Second-order effects
- Because Teams ships inside Microsoft's Office licensing, Slack is forced to compete against software customers already pay for, pushing it toward deeper integrations and enterprise features rather than head-on pricing battles.
- Every subsequent Teams disclosure becomes a direct market event for Slack shareholders, as seen when the November 20M claim sent Slack down roughly 8% — user metrics effectively become quarterly earnings news for a competitor.
Third-order effects
- The pattern that holds through the coverage — Teams reaching 145M DAUs by 2021 and 280M MAUs by 2023 — points to collaboration tools consolidating inside productivity suites, leaving standalone chat vendors fighting for the segment that wants best-of-breed over bundle economics.
- Vanity-metric disclosures become a standing competitive weapon: once one vendor publishes user counts, rivals must either match the cadence or cede the comparison, turning adoption statistics into a regulated-by-markets disclosure regime across SaaS.
The trend: Workplace communication is being absorbed into bundled productivity suites, with suite owners' user-count disclosures setting the competitive tempo for independent chat vendors.